Torque Ripple Reduction in Permanent Magnet Synchronous Motors Using Adaptive Control Strategies

Abstract

Permanent magnet synchronous motors (PMSMs) are widely used in low traction systems due to their high cost, a significant effect on the mechanical stability, acoustics, and durability of the drive train, which is caused by torque ripple. The torque components due to oscillation cause the torque to be excited in torsional dynamic and increases vibration harmonic behaviour especially during change in dynamic loads. This paper suggests an adaptive amplitude-controlled HFI control algorithm to reduce the ripple of the torque, and maintain precise rotor position feedback in sensorless PMSM drives. In contrast to the traditional solution that uses a fixed amplitude injection schemes, the proposed method is a dynamical adjustment of injection amplitude to the real-time behaviour of torque ripple, and therefore better electromagnetic smoothness is achieved without sacrificing estimation strength. The dynamic model of PMSM is defined on MATLAB/Simulink and tested within a 5003000rpm operating range with step and sinusoidal disturbance loads. The measurements of mechanical performance are torque ripple factor, speed ripple percentage, and frequency domain vibration spectrum analysis. Through simulation findings, it has been seen that there is 43 percent decrease in torque ripple factor and about 48 percent decrease in speed ripple as compared to the fixed-parameter control. Harmonic analysis shows that major dominant 6 th -order torque harmonics have been reduced, which contributes to better torsional stability. The results validate that adaptive amplitude control of injections improves the mechanical integrity and smoothness of operation of small electric mobility systems. The recommended framework offers a viable low-voltage control structure to the condition of low-voltage traction low-voltage Permanent magnet motor demands enhanced NVH dynamic action, and reliability in structure.